Medium 5.4Published Mar 27, 2026

CVE-2026-32859ByteDance DeerFlow Stored XSS via Inline Artifact Rendering

Updated under an hour ago (Oct 27, 2026, 4:10 PM ET)

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It affects Bytedance Inc. DeerFlow. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Bytedance Inc. DeerFlow

Exploited in the last 30 days

ByteDance DeerFlow versions prior to commit 5dbb362 contain a stored cross-site scripting vulnerability in the artifacts API that allows attackers to execute arbitrary scripts by uploading malicious HTML or script content as artifacts. Attackers can store malicious content that executes in the browser context when users view artifacts, leading to session compromise, credential theft, and arbitrary script execution.

CVSS: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Aug 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Bytedance Inc. DeerFlow bytedance:deerflow (from the name)	before 5dbb3623b2f0e490c8bb3cd81b1e3b1b12eae1a6	CNA record

References

References

https://github.com/bytedance/deer-flow/pull/1389	issue-tracking
https://github.com/bytedance/deer-flow/commit/5dbb3623b2f0e490c8bb3cd81b1e3b1b12eae1a6	patch
https://www.vulncheck.com/advisories/bytedance-deerflow-stored-xss-via-inline-artifact-rendering	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.